First Order Design and Application of a Co-planar Waveguide Matching Network for a Field Emitter Array Using the Microwave-to-Optical Transformation (MOT) Method

摘要

The Microwave-to-Optical Transformation (MOT) method is based on the Optical Admittance Diagram (OAD) an optical thin film filter design tool that uses the characteristic matrix, and the quarter wave rule for the design and analysis of microwave and optical computing circuits/components. As previously reported, this technique has also been extended for characterization of the electric field strength of certain microwave devices. This paper discusses a MOT designed co-planar waveguide transition component or network for use in launching power to a new generation microwave source known as a Field Emitter Array (FEA). This paper will give a brief description of an FEA and discuss the feasibility of designing a co-planar waveguide for this particular application. The reader is then lead through the step-by-step graphical and analytical technique utilizing the MOT method to achieve the appropriate cascaded co-planar waveguide design. Standard microwave design equations and techniques are used in conjunction with the MOT method in order to validate the design. The development of such a device will allow future technological advances in high-intensity electron beam source applications to reduce size while maintaining performance. For example, this co-planar waveguide network was designed for use in the experimental investigation of a compact cold-cathode microwave electron buncher (CCEB) which is also discussed in this paper. The CCEB uses a miniature gated cold-cathode which eliminates the need for heating elements and yields a super-fast turn-on microwave-driven electron source that should provide an order of magnitude improvements in size and power over current technologies.